That's Amores (Holiday series aka Dugan Brothers #3)

Love flies with the speed of an arrow.

How's a girl supposed to stay single with the entire town wants her married?
Alessa Lombard has a plan to avoid the marriage trap. It's not that she's opposed to marriage—wedded bliss is fine…for other people. All she needs is the help of the town's newest bachelor to help pull off a fake romance, and the family curse won’t have a chance to ruin her life.

Determined to fall in love, Sloan Dugan immigrates to the magical town of Amores. Surely, in a town devoted to love, he'll find a woman who doesn't use trickery and deceit.

But Cupid has other plans. Alessa and Sloan will find themselves playing the game of love whether they want to or not. Will winner take all? Or lose everything?